Update: Demi Lovato's aunt, Kerissa Dunn, posted to social media that her niece is "awake and responsive," according to TMZ.

Demi Lovato has reportedly been hospitalized in Los Angeles due to an apparent drug overdose.

Lovato was rushed to the hospital just before noon on Tuesday after suffering what appeared to be a heroin overdose at a home in the Hollywood Hills, law enforcement told TMZ. While the outlet reports that Lovato is currently being treated, her present condition is unknown.

TMZ updated its report, stating that paramedics were called to Lovato's home, where she was found unconscious. She was later treated with Narcan, an emergency treatment for narcotic overdoses, TMZ says. The singer was reportedly out celebrating a friend's birthday in West Hollywood the night before.

According to the New York Daily News, while a spokesperson for the Los Angeles Police Department did confirm that authorities responded to a medical emergency regarding a 25-year-old female near the Hollywood Hills on Tuesday, they did not confirm Lovato’s identity.

The 25-year-old singer has been vocal in the past about her struggle with sobriety. The song “Sober,” released June 21, revealed that Lovato had fallen off the wagon after six years sober from drugs and alcohol, Vogue reports.

Through her lyrics, Lovato apologized to her loved ones and her fans for backsliding, and addressed the struggle of relapsing with revealing lyrics like, “To the ones who never left me, we’ve been down this road before. I’m so sorry, I’m not sober anymore.”

Lovato celebrated six years of sobriety in March, writing in a heartfelt Twitter post, “Just officially turned 6 years sober. So grateful for another year of joy, health and happiness. It IS possible.”